DSE 8610 MKII, Operator'S Manual

Page: 102 / 188

Description of Controls
057-254 ISSUE: 2 Page 102 of 188
4.2.8 SERIAL PORT
4.2.8.1
RS232 SERIAL PORT
This section is included to give information about the RS232 serial port and external modem (if
connected).
The items displayed on this page change depending upon configuration of the module. Refer to the
system supplier for further details.
NOTE: Factory Default settings are for the RS232 port to be enabled with no modem
connected, operating at 19200 baud, MODBUS slave address 10.
Connected To an RS232 Telephone Modem
When the module is powered up, it sends ‘initialisation strings’ to the connected modem. It is
important therefore that the modem is already powered, or is powered up at the same time as the
module. At regular intervals after power up, the modem is reset, and reinitialised, to ensure the
modem does not ‘hang up’.
If the module does not correctly communicate with the modem, “Modem initialising’ appears on the
Serial Port instrument screen as shown overleaf.
If the module is set for “incoming calls” or for “incoming and outgoing calls”, once the modem is
dialled, it answers after two rings (using the factory setting ‘initialisation strings). Once the call is
established, all data is passed between the dialling PC and the module.
If the module is set for “outgoing calls” or for “incoming and outgoing calls”, then the module dials out
whenever an alarm is generated.
NOTE: Not all alarms generate a dial out command; this is dependant upon module
configuration of the event log. Any event configured to be recorded in the event log causes the
modem to dial out to a PC.
Press the Scroll Down button view the modem
status....
Indicates that the RS232 port is
configured for modem use. It displays
‘RS232’ if no modem is configured.